scholarly journals Study of the application of Acoustic Emission technology for on-line monitoring of bubble phenomena and flow patterns in two-phase gas-liquid flow

2012 ◽  
Author(s):  
S. Husin ◽  
A. Addali ◽  
D. Mba
Keyword(s):  
Acoustic Emission ◽  
Liquid Flow ◽  
Flow Patterns ◽  
Two Phase ◽  
On Line ◽  
Gas Liquid Flow ◽  
Acoustic Emission Technology

Experimental Study on Flow Patterns of Decaying Swirling Gas-Liquid Flow in a Horizontal Pipe

2020 ◽  
Author(s):  
Shuai Liu ◽  
Li Liu ◽  
Jiarong Zhang ◽  
Hanyang Gu
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Separation Efficiency ◽  
Swirling Flow ◽  
Flow Patterns ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Gas Removal ◽  
Swirl Vane ◽  
Gas Liquid Flow

Abstract Swirling flow is one of the well-recognized techniques to control the working process. This special flow is widely adopted in swirl vane separators in nuclear steam generator (SG) for water droplet separation and the fission gas removal system in Thorium Molten Salt Reactor (TMSR) for gas bubble separation. Since the parameters such as separation efficiency, pressure drop and mass and heat transfer rate are strongly dependent on the flow pattern, the accurate prediction of flow patterns and their transitions is extremely important for the proper design, operation and optimization of swirling two-phase flow systems. In this paper, using air and water as working fluids, a visualization experiment is carried out to study the gas-liquid flow in a horizontal pipe containing a swirler with four helical vanes. The test pipe is 5 m in length and 30 mm in diameter. Firstly, five typical flow patterns of swirling gas-liquid flow at the outlet of the swirler are classified and defined, these being spiral chain, swirling gas column, swirling intermittent, swirling annular and swirling ribbon flow. Being affected by the different gas and liquid flow rate of non-swirling flow, it is found that the same non-swirling flow can change into different swirling flow patterns. After that, the evolution of various swirling flow patterns along the streamwise direction is analyzed considering the influence of swirl attenuation. The results indicate that the same swirling flow pattern can transform into a variety of swirling flow patterns and subsequent non-swirling flow patterns. Finally, the flow pattern maps at different positions downstream of the swirler are presented.

Effect of Fluid Properties on Flow Patterns in Two-Phase Gas−Liquid Flow in Horizontal and Downward Pipes†

2011 ◽  
Vol 50 (2) ◽  
pp. 645-655 ◽  
Author(s):  
Christina Tzotzi ◽  
Vasilis Bontozoglou ◽  
Nikolaos Andritsos ◽  
Michael Vlachogiannis
Keyword(s):  
Liquid Flow ◽  
Flow Patterns ◽  
Two Phase ◽  
Fluid Properties ◽  
Gas Liquid Flow

ANN-based prediction of two-phase gas- liquid flow patterns in a circular conduit

AIChE Journal ◽  
2006 ◽  
Vol 52 (9) ◽  
pp. 3018-3028 ◽  
Author(s):  
H. Sharma ◽  
G. Das ◽  
A. N. Samanta
Keyword(s):  
Liquid Flow ◽  
Flow Patterns ◽  
Two Phase ◽  
Gas Liquid Flow

Gas-Liquid Flow Through Horizontal Eccentric Annuli: CFD and Experiments Compared

2011 ◽  
Author(s):  
Mehmet Sorgun ◽  
Reza E. Osgouei ◽  
M. Evren Ozbayoglu ◽  
A. Murat Ozbayoglu
Keyword(s):  
Liquid Flow ◽  
High Speed ◽  
Two Phase Flow ◽  
Flow Behavior ◽  
Flow Patterns ◽  
Phase Flow ◽  
Cfd Model ◽  
Flow Loop ◽  
Two Phase ◽  
Gas Liquid Flow

Although flow of two-phase fluids is studied in detailed for pipes, there exists a lack of information about aerated fluid flow behavior inside a wellbore. This study aims to simulate gas-liquid flow inside horizontal eccentric annulus using an Eulerian-Eulerian computational fluid dynamics (CFD) model for two-phase flow patterns i.e., dispersed bubble, dispersed annular, plug, slug, churn, wavy annular. To perform experiments using air-water mixtures for various in-situ air and water flow rates, a flow loop was constructed. A digital high speed camera is used for recording each test dynamically for identification of the liquid holdup and flow patterns. Results showed that CFD model predicts frictional pressure losses with an error less than 20% for all two-phase flow patterns when compared with experimental data.

scholarly journals Experimental study on two-phase gas-liquid flow patterns at normal and reduced gravity conditions

2001 ◽  
Vol 44 (5) ◽  
pp. 553-560 ◽  
Author(s):  
Jianfu Zhao ◽  
Jingchang Xie ◽  
Hai Lin ◽  
Wenrui Hu
Keyword(s):  
Experimental Study ◽  
Liquid Flow ◽  
Flow Patterns ◽  
Reduced Gravity ◽  
Two Phase ◽  
Gas Liquid Flow
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